Well I took the seats out and tried to put some spacers under the front to recline the back a little, but that didn't work as the front bolts would not go back in (wrong angle).
So I bought some upholstery foam and took the seat cushions out. They are only Velcroed in so come out very easily, need to be careful though if the seats are heated so you don't break the cables.
Once the cushions were out I cut some foam and filled in the seat base and back. This makes the seat a little comfier for long trips but more importantly reduces the 'bucket' effect by 25mm and this makes all the difference. I can now wriggle about and get comfortable and depending where you put the foam you can reduce the upright nature of the seat.
I have no idea why Porsche don't make adjustable bucket seats. Its a massive oversight going from a slab comfort seat to a full bucket with no in between. My old Audi RS4 wingbacks were supremely comfortable as were the standard McLaren sports seats in my 12C, even the old 993/996/997 sports seats were comfy, good looking and held you in place.
Cheers everyone.